Figure 3-7. Alternate External Resistor Placement For The Tpu2000R; Figure 3-8. Rs485 Communication Cabling (Tpu2000R) - ABB TPU2000 Technical Manual

TPU2000/2000R Modbus/Modbus Plus/ Modbus TCP/IP Automation Guide
120
Ohms
55 56 57 58 59 60 61 -----
Unit 1
End Unit

Figure 3-7. Alternate External Resistor Placement for the TPU2000R

Cable "B" RS485 Connection
Shield is Frame Grounded
at one point
*See
Note
55 56 57 58 59 60 61 -----
End Unit
The TPU2000 has the two wire RS485 communication connectivity terminals located in a different position than
that for the TPU2000R. Table 3-2 lists the AUX COM connector signal assignments for the TPU2000.
Topology Diagram for RS485 Multi-Drop Architecture - if external
resistors are installed providing proper termination.
Cable "A"
See Attached Diagram
475 Ohms
475 Ohms
AUX Port
* - See note A
E C E C
Unit 2
Inline Unit
32 Devices and 3000 Feet Maximum loading and distance.
Shield is
isolated
RS485 Isolated Port
3

Figure 3-8. RS485 Communication Cabling (TPU2000R)

* Note A - Following Cable Recommended
Alpha # 58902
Belden # 9729, # 9829
Carol #58902
Unicom Physical Interface
:
Converter Switch Settings
- DTE
- RS232-RS485
- 19200 Baud
- HD
Three-wire cable with
shield. Cable "B" - see attached diagram.
Unit 31
Jumpers
Inline Unit
J6, J7, J8
"OUT"
*Note - Reference the Topology Drawing
for Termination configuration if internal
or external termination is selected.
Shield
Isolated
55 56 57 58 59 60 61 -----
RS485 Isolated Port
3
Inline Unit
120
Ohms
55 56 57 58 59 60 61 -----
AUX Port
E C E C
Unit 32
End Unit
Shield is
isolated
55 56 57 58 59 60 61 -----
RS485 Isolated Port
3
End Unit
16